Pixel unit of a display panel, lower substrate of a display panel, and display panel

ABSTRACT

The present application discloses a pixel unit of a display panel, a lower substrate of a display panel, and a display panel. The present application by disposing a transparent shielding electrode element connected to a common signal line and extending into the aperture region and making an orthogonal projection of the transparent shielding electrode element on a plane where the common signal line is located at least partially overlap the common signal line, extends a shielding effect provided by the common signal line such that a parasitic capacitor between the pixel electrode and the data line is lowered.

FIELD OF INVENTION

The present application relates to a field of display technologies,especially to a pixel unit of a display panel, a lower substrate of adisplay panel, and a display panel.

BACKGROUND OF INVENTION

With development of liquid crystal display panel technologies, atransmittance of a pixel on display panel almost reaches the limit.Various pixel designs of conventional display panels all aim atsimplification of wiring to increase a aperture region area to furtherraise an aperture rate and improve the transmittance.

With reference to FIG. 1 , FIG. 1 is a partial plan view of a pixel unitof a conventional liquid crystal display panel. The pixel unit comprisesa data line DL′ and a scan line SL′ that perpendicularly intersect eachother, and a pixel electrode element P′ located at an intersectionlocation of the data line DL′ and the scan line SL′. The pixel electrodeelement P′ comprises a main pixel electrode M′ and a sub-pixel electrodeS′. To increase an aperture rate of the display panel, the pixel unitskips black matrix (Data Black Matrix Less, DBL) on the data line DL′,and skips a design of using a common electrode C′ as a shielding metal,but uses a wiring of the sub-pixel electrode S′ as a shielding elementto lower a parasitic capacitor between the main pixel electrode M′ andthe data line DL′. However, such pixel unit design has an issue that thesub-pixel electrode S′ in most of the time is floating without potentialcontrol such that it's shielding function is very limited and results inan excessively large parasitic capacitor between the main pixelelectrode M′ and the data line DL′, which results in serious issues ofcolor crosstalk and vertical crosstalk.

SUMMARY OF INVENTION Technical issue

The embodiment of the present application provides a pixel unit of adisplay panel, a lower substrate of a display panel, and a display panelto solve a technical issue of a excessive parasitic capacitor between amain pixel electrode of a pixel unit and a data signal line in aconventional display panel further causing serious color crosstalk andvertical crosstalk.

Technical Solution

In an aspect, an embodiment of the present application a pixel unit of adisplay panel, comprising:

-   -   a scan signal line;    -   a data signal line perpendicularly intersecting the scan signal        line, wherein an aperture region is formed in an intersection        location between the scan signal line and the data signal line;    -   a common signal line disposed to be parallel to the scan signal        line, wherein a common electrode is formed on the common signal        line;    -   a pixel electrode disposed in the aperture region; and    -   a transparent shielding electrode element connected to the        common signal line and extending from the common signal line        into the aperture region, wherein an orthogonal projection of        the transparent shielding electrode element on a plane where the        common signal line is located at least partially overlap the        common signal line.

In some embodiments of the present application, the transparentshielding electrode element is U-shaped, and comprises a first shieldingsection and two second shielding sections, the two second shieldingsections extend from the common signal line into the aperture region, anend of each of the second shielding sections is connected to the commonsignal line, another end of each of the second shielding sections isconnected to an end of the first shielding section, and an orthogonalprojection of each of the second shielding sections on the plane wherethe common signal line is located at least partially overlaps the commonsignal line.

In some embodiments of the present application, the transparentshielding electrode element comprises two shielding bars, the twoshielding bars are individual and spaced from each other, and extendfrom the common signal line into the aperture region, an end of each ofthe shielding bars is connected to the common signal line, and anorthogonal projection of each of the shielding bars on the plane wherethe common signal line is located at least partially overlaps the commonsignal line. Furthermore, the two shielding bars can be parallel.

In some embodiments of the present application, the transparentshielding electrode element and the common signal line are individuallyindependent elements, and contact and are connected to each other.

In some embodiments of the present application, a material of thetransparent shielding electrode element is indium tin oxide.

In another aspect, the embodiment of the present application provides alower substrate of the display panel, comprising a glass substrate, anda first metal layer, a second metal layer, and a first transparentconductive layer sequentially stacked on the glass substrate, whereinthe lower substrate further comprises:

-   -   a scan signal line formed by patterning the first metal layer;    -   a data signal line formed by patterning the second metal layer,        perpendicularly intersecting the scan signal line, wherein an        aperture region is formed in an intersection location between        the scan signal line and the data signal line;    -   a common signal line disposed on a same layer with the scan        signal line and parallel to the scan signal line, wherein a        common electrode is formed on the common signal line;    -   a pixel electrode formed by patterning the first transparent        conductive layer, and disposed in the aperture region; and    -   a transparent shielding electrode element connected to the        common signal line, extending from the common signal line into        the aperture region, and an orthogonal projection of the        transparent shielding electrode element on a plane where the        common signal line is located at least partially overlaps the        common signal line for providing a shielding effect and lower a        parasitic capacitor between the pixel electrode and the data        signal line.

In some embodiments of the present application, the transparentshielding electrode element comprises a first shielding section and twosecond shielding sections extending from the first shielding section andspaced from each other, each of the second shielding sections isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the second shielding sections onthe plane where the common signal line is located overlaps the commonsignal line for providing a shielding effect and lowering a parasiticcapacitor between the pixel electrode and the data signal line.

In some embodiments of the present application, the transparentshielding electrode element comprises two shielding bars beingindividual and spaced from each other, and each of the shielding bars isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the shielding bars on the planewhere the common signal line is located overlaps the common signal line.Furthermore, the two shielding bars can be parallel.

In some embodiments of the present application, the lower substratefurther comprises a second transparent conductive layer, wherein thesecond transparent conductive layer is disposed between the glasssubstrate and the first metal layer, and the transparent shieldingelectrode element is formed by patterning the second transparentconductive layer.

In some embodiments of the present application, the transparentshielding electrode element and the common signal line are individuallyindependent elements, and contact and are connected to each other; and

-   -   a material of the transparent shielding electrode element is        indium tin oxide.

In some embodiments of the present application, the transparentshielding electrode element comprises a first shielding section and twosecond shielding sections extending from the first shielding section andspaced from each other, each of the second shielding sections isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the second shielding sections onthe plane where the common signal line is located overlaps the commonsignal line.

In some embodiments of the present application, the transparentshielding electrode element comprises two shielding bars beingindividual and spaced from each other, and each of the shielding bars isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the shielding bars on the planewhere the common signal line is located overlaps the common signal line.

In some embodiments of the present application, the lower substrate,further comprises a second transparent conductive layer, and the secondtransparent conductive layer is disposed between the glass substrate andthe first metal layer, and the transparent shielding electrode elementis formed by patterning the second transparent conductive layer.

In another aspect, the embodiment of the present application provides adisplay panel, comprising: a lower substrate, an upper substratedisposed opposite to the lower substrate, and a liquid crystal layerdisposed between the upper substrate and the lower substrate, whereinthe lower substrate comprises:

-   -   a glass substrate, and a first metal layer, a second metal        layer, and a first transparent conductive layer sequentially        stacked on the glass substrate;    -   a scan signal line formed by patterning the first metal layer;    -   a data signal line formed by patterning the second metal layer,        perpendicularly intersecting the scan signal line, wherein an        aperture region is formed in an intersection location between        the scan signal line and the data signal line;    -   a common signal line disposed on a same layer with the scan        signal line and parallel to the scan signal line, wherein a        common electrode is formed on the common signal line;    -   a pixel electrode formed by patterning the first transparent        conductive layer, and disposed in the aperture region; and    -   a transparent shielding electrode element connected to the        common signal line, extending from the common signal line into        the aperture region, and an orthogonal projection of the        transparent shielding electrode element on a plane where the        common signal line is located at least partially overlaps the        common signal line.

In some embodiments of the present application, the transparentshielding electrode element comprises a first shielding section and twosecond shielding sections extending from the first shielding section andspaced from each other, each of the second shielding sections isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the second shielding sections onthe plane where the common signal line is located overlaps the commonsignal line.

In some embodiments of the present application, the transparentshielding electrode element comprises two shielding bars beingindividual and spaced from each other, and each of the shielding bars isconnected to the common signal line by contact or integral formation,and an orthogonal projection of each of the shielding bars on the planewhere the common signal line is located overlaps the common signal line.

In some embodiments of the present application, the display panelfurther comprises a second transparent conductive layer, the secondtransparent conductive layer is disposed between the glass substrate andthe first metal layer, and the transparent shielding electrode elementis formed by patterning the second transparent conductive layer. In someembodiments of the present application, the transparent shieldingelectrode element comprises a first shielding section and two secondshielding sections extending from the first shielding section and spacedfrom each other, each of the second shielding sections is connected tothe common signal line by contact or integral formation, and anorthogonal projection of each of the second shielding sections on theplane where the common signal line is located overlaps the common signalline; the transparent shielding electrode element comprises twoshielding bars being individual and spaced from each other, and each ofthe shielding bars is connected to the common signal line by contact orintegral formation, and an orthogonal projection of each of theshielding bars on the plane where the common signal line is locatedoverlaps the common signal line; and the display panel further comprisesa second transparent conductive layer, the second transparent conductivelayer is disposed between the glass substrate and the first metal layer,and the transparent shielding electrode element is formed by patterningthe second transparent conductive layer.

In some embodiments of the present application, the transparentshielding electrode element and the common signal line are individuallyindependent elements, and contact and are connected to each other.

In some embodiments of the present application, a material of thetransparent shielding electrode element is indium tin oxide.

Advantages

The present application at least comprises advantages as follows:

The pixel unit of the display panel, the lower substrate of the displaypanel, and the display panel provided by the present application, bydisposing a transparent shielding electrode element connected to acommon signal line and extending into the aperture region and making anorthogonal projection of the transparent shielding electrode element ona plane where the common signal line is located at least partiallyoverlap the common signal line, extends a shielding effect provided bythe common signal line such that a parasitic capacitor between the pixelelectrode and the data line is lowered to solve the technical issue of aexcessive parasitic capacitor between a main pixel electrode portion ofa pixel unit and a data signal line in a conventional display panelfurther causing serious color crosstalk and vertical crosstalk.Furthermore, because the transparent shielding electrode element and thepixel electrode of the present application are transparent conductiveelectrodes, therefore the transparent shielding electrode elementextending into the aperture region would not reduce an aperture rate anda transmittance of the pixel unit to prevent reduction of the aperturerate and the transmittance of a shielding metal of the conventionalpixel unit located in the aperture region.

DESCRIPTION OF DRAWINGS

To more clearly elaborate on the technical solutions of embodiments ofthe present invention or prior art, appended figures necessary fordescribing the embodiments of the present invention or prior art will bebriefly introduced as follows. Apparently, the following appendedfigures are merely some embodiments of the present invention. A personof ordinary skill in the art may acquire other figures according to theappended figures without any creative effort.

FIG. 1 is a schematic plan view of a pixel unit of a conventionaldisplay panel;

FIG. 2 is a schematic exploded perspective view of a display panelprovided by an embodiment of the present application;

FIG. 3 a is a schematic plan view of the pixel unit of the display panelprovided by the embodiment of the present application;

FIG. 3 b is a schematic plan view of the pixel unit of the display panelprovided by the embodiment of the present application, wherein pixelelectrode is omitted and an aperture region is marked out;

FIG. 4 is a schematic plan view of a common signal line in a first metallayer of the pixel unit of the display panel provided by the embodimentof the present application partially overlapping a transparent shieldingelectrode element;

FIG. 5 is a schematic plan view of the pixel unit of the display panelprovided by another embodiment of the present application; and

FIG. 6 is a schematic plan view of the common signal line of the firstmetal layer in the pixel unit of the display panel provided by anotherembodiment of the present application partially overlapping thetransparent shielding electrode element.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The technical solution in the embodiment of the present application willbe clearly and completely described below with reference to theaccompanying drawings in the embodiments of the present application.Apparently, the described embodiments are merely some embodiments of thepresent application instead of all embodiments. According to theembodiments in the present application, all other embodiments obtainedby those skilled in the art without making any creative effort shallfall within the protection scope of the present application.

In addition, it should be understood that the specific embodimentsdescribed here are only used to illustrate and explain the presentapplication, and are not used to limit the present application. In thepresent application, the used orientation terminologies such as “upper”and “lower”, when are not specified to the contrary explanation, usuallyrefer to the upper and lower states of the device in actual use orworking conditions, specifically according to the direction of thefigures in the drawings. Furthermore, “inner” and “outer” refer to theoutline of the device.

The embodiment of the present application provides a pixel unit of adisplay panel, a lower substrate of a display panel, and a display panelto solve a technical issue of a excessive parasitic capacitor between amain pixel electrode of a pixel unit and a data signal line in aconventional display panel further causing serious color crosstalk andvertical crosstalk.

With reference to FIGS. 2, 3 a and 3 b, the pixel unit 3 of the displaypanel provided by the embodiment of the present application comprises: ascan signal line SL, a data signal line DL, a common signal line CL, apixel electrode P, and a transparent shielding electrode element 20.

Agate electrode G is formed on the scan signal line SL.

The data signal line DL perpendicularly intersects the scan signal lineSL. An aperture region OA is formed in an intersection location betweenthe scan signal line SL and the data signal line DL, as shown in FIG. 3b.

The common signal line CL is disposed to be parallel to the scan signalline SL, and a common electrode C is formed on the common signal lineCL.

The pixel electrode P is disposed in the aperture region OA and cancomprise a main pixel electrode portion M and a sub-pixel electrodeportion S.

The transparent shielding electrode element 20 is connected to thecommon signal line CL and extends from the common signal line CL intothe aperture region OA, and an orthogonal projection of the transparentshielding electrode element 20 on a plane where the common signal lineCL is located at least partially overlaps the common signal line CL. Inparticular, a part of the common signal line CL covers a part of thetransparent shielding electrode element 20, or a part of the transparentshielding electrode element 20 covers a part of the common signal lineCL.

In particular, the transparent shielding electrode element 20 serves asan electrode for extending a shielding effect of the common signal lineCL to further lower the parasitic capacitor between the main pixelelectrode portion M and the data signal line DL to further prevent theissues of color crosstalk and vertical crosstalk. In a preferredembodiment of the present application, a material of the transparentshielding electrode element 20 can be indium tin oxide (ITO).

With reference to FIGS. 3 a, 3 b , and 4, in an embodiment of thepresent application, the transparent shielding electrode element 20 isU-shaped, comprises 1 first shielding section 21 and two secondshielding sections 22. The two second shielding sections 22 extend fromthe common electrode C into the aperture region OA. An end of each ofthe second shielding sections 22 is connected to the common signal lineCL, and another end of each of the second shielding sections 22 isconnected to an end of the first shielding section 21. An orthogonalprojection of each of the second shielding sections 22 on the planewhere the common signal line CL is located at least partially overlapthe common signal line CL. Furthermore, the two second shieldingsections 22 are located near the data signal line DL of the pixel unitand another data signal line DL of an adjacent pixel unit furtherincluded by the display panel and the two second shielding sections 22can located on two sides of main pixel electrode portion M of the pixelelectrode P to further lower the parasitic capacitor between the mainpixel electrode portion M and the data signal line DL.

With reference to FIGS. 5 and 6 , in another embodiment of the presentapplication, the transparent shielding electrode element 20 a comprisestwo shielding bars 23. The two shielding bars 23 are individual andspaced from each other, extend from the common signal line CL into theaperture region OA, and an end of each of the shielding bars 23 isconnected to the common signal line CL. An orthogonal projection of eachof the shielding bars 23 on the plane where the common signal line CL islocated at least partially overlap the common signal line CL.Furthermore, the two shielding bars 23 are located near the data signalline DL of the pixel unit and another data signal line DL of an adjacentpixel unit further included by the display panel, and the two shieldingbars 23 can be located on two sides of main pixel electrode portion M ofthe pixel electrode P to further lower the parasitic capacitor betweenthe main pixel electrode portion M and the data signal line DL.

In some embodiments of the present application, the transparentshielding electrode element 20 and the common signal line CL are locatedin different material layers, are elements being individual andseparated from each other, and contact and are connected to each other.Alternatively, in some embodiments of the present application, both thetransparent shielding electrode element 20 and the common signal line CLare disposed on a surface of the glass substrate 10, and a part of thecommon electrode C covers a part of the transparent shielding electrodeelement 20, or a part of the transparent shielding electrode element 20covers a part of the common electrode C.

With reference to FIGS. 2, 3 a, and 3 b, the lower substrate of thedisplay panel 1 provided by the embodiment of the present application,comprises a glass substrate 10, and a first metal layer M1, a secondmetal layer M2, and a first transparent conductive layer 30 sequentiallystacked on the glass substrate 10, wherein the lower substrate 1 furthercomprises: a scan signal line SL, a data signal line DL, a common signalline CL, pixel electrode P, and a transparent shielding electrodeelement 20.

The scan signal line SL is formed by patterning the first metal layerM1, and a gate electrode G is formed on the scan signal line SL.

The data signal line DL is formed by patterning the second metal layerM2, perpendicularly intersects the scan signal line SL. an apertureregion OA is formed in an intersection location between the scan signalline SL and the data signal line DL.

The common signal line CL is disposed in a same layer with the scansignal line SL and is parallel to the scan signal line SL. A commonelectrode C is formed on the common signal line CL.

The pixel electrode P is formed by patterning the first transparentconductive layer 30, is disposed in the aperture region OA, and cancomprise a main pixel electrode portion M and a sub-pixel electrodeportion S.

The transparent shielding electrode element 20 is connected to thecommon signal line CL, extends from the common signal line CL into theaperture region, and an orthogonal projection of the transparentshielding electrode element 20 on the plane where the common signal lineCL is located at least partially overlap the common signal line CL.

In particular, the transparent shielding electrode element 20 serves asa shielding electrode to shield the common signal line CL to furtherlower a parasitic capacitor between the main pixel electrode portion Mand the data signal line DL, and further prevent the issues of colorcrosstalk and vertical crosstalk. In a preferred embodiment of thepresent application, a material of the transparent shielding electrodeelement 20 can be indium tin oxide (ITO).

With reference to FIGS. 3 a, 3 b , and 4, in an embodiment of thepresent application, the transparent shielding electrode element 20 isU-shaped and comprises a first shielding section 21 and two secondshielding sections 22. The two second shielding sections 22 extend fromthe common signal line CL into the aperture region. An end of each ofthe second shielding sections 22 is connected to the common signal lineCL, and another end of each of the second shielding sections 22 isconnected to an end of the first shielding section 21. An orthogonalprojection of each of the second shielding sections 22 on the planewhere the common signal line CL is located at least partially overlapthe common signal line CL. Furthermore, the two second shieldingsections 22 are located near the data signal line DL of the pixel unitand another data signal line DL of an adjacent the pixel unit furtherincluded by the display panel, and the two second shielding sections 22can be located on two sides of the main pixel electrode portion M of thepixel electrode P respectively to further lower a parasitic capacitorbetween the main pixel electrode portion M and the data signal line DL.

In particular, the lower substrate of the display panel 1 provided bythe embodiment of the present application further comprises aninsulation layer GI, semiconductor layer (not shown), a firstpassivation layer PV1, a color photoresist layer CF, and a secondpassivation layer PV2. The glass substrate 10, the first metal layer M1,the insulation layer GI, the semiconductor layer, the second metal layerM2, the first passivation layer PV1, the color photoresist layer CF, thesecond passivation layer PV2, and the first transparent conductive layer30 are sequentially stacked on one another to form the lower substrate1.

With reference to FIGS. 5 and 6 , in another embodiment of the presentapplication, the transparent shielding electrode element 20 comprisestwo shielding bars 23. The two shielding bars 23 are individual andspaced from each other, and extend from the common signal line CL intothe aperture region. An end of each of the shielding bars 23 isconnected to the common signal line CL, and an orthogonal projection ofeach of the shielding bars 23 on the plane where the common signal lineCL is located at least partially overlap the common signal line CL.Furthermore, the two shielding bars 23 are located near the data signalline DL of the pixel unit and another data signal line DL of an adjacentpixel unit further included by the display panel, and the two shieldingbars 23 can be located two sides of the main pixel electrode portion Mof the pixel electrode P respectively to further lower the parasiticcapacitor between the main pixel electrode portion M and the data signalline DL.

In some embodiments of the present application, the transparentshielding electrode element 20 is formed by patterning the secondtransparent conductive layer. In particular, the second transparentconductive layer is disposed between the glass substrate 10 and thefirst metal layer M1. The transparent shielding electrode element 20 isformed by patterning the second transparent conductive layer with alithography process.

In another aspect, the display panel provided by the embodiment of thepresent application comprises: the lower substrate 1 of the aboveembodiment, an upper substrate 2 disposed opposite to the lowersubstrate 1, and a liquid crystal layer LC disposed between the uppersubstrate 2 and the lower substrate 1. In particular, upper substrate 2further comprises a black matrix BM to define the aperture region OA.Furthermore, the upper substrate 2 further comprises an upper substratecommon electrode CC and a top cover CG, as shown in FIG. 2 .

The following comparison table is for comparison between a parasiticcapacitor of the above pixel unit before increasing the transparentshielding electrode element 20 and after increasing the transparentshielding electrode element 20. It can be understood from the comparisontable that after the U-shaped transparent electrode is increased, theparasitic capacitor of the main pixel electrode portion M can bedecreased to 12% of an original value, and the parasitic capacitor/totalcapacitor is reduced from 1.24% to 0.15%, which indicates that thetransparent shielding electrode element 20 has a parasitic capacitorreduction effect. When an area of the transparent shielding electrodeelement 20 is sufficiently increased, the parasitic capacitor/totalcapacitor would be smaller.

Before increase of After increase of the After increase of thetransparent U-shaped transparent 11-shaped transparent Main pixelelectrode shielding electrode shielding electrode shielding electrodeportion M element 20 element 20 element 20 Parasitic capacitor [fF]4.070 0.486 0.561 Total capacitor [fF] 327.560 333.259 331.566 Parasitic1.24% 0.15% 0.17% capacitor/Total capacitor

The present application at least comprises advantages as follows:

The pixel unit of the display panel, the lower substrate 1 of thedisplay panel, and the display panel provided by the presentapplication, by disposing a transparent shielding electrode element 20connected to a common electrode C and extending into the aperture regionand making an orthogonal projection of the transparent shieldingelectrode element 20 on a plane where the common signal line CL islocated at least partially overlap the common signal line CL, extends ashielding effect provided by the common signal line CL such that aparasitic capacitor between the pixel electrode and the data line islowered to solve the technical issue of a excessive parasitic capacitorbetween a main pixel electrode portion M of a pixel unit and a datasignal line in a conventional display panel further causing seriouscolor crosstalk and vertical crosstalk. Furthermore, because thetransparent shielding electrode element 20 and the pixel electrode P ofthe present application are transparent conductive electrodes, thereforethe transparent shielding electrode element 20 extending into theaperture region would not reduce an aperture rate and a transmittance ofthe pixel unit to prevent reduction of the aperture rate and thetransmittance of a shielding metal of the conventional pixel unitlocated in the aperture region.

In the specification, the specific examples are used to explain theprinciple and embodiment of the present application. The abovedescription of the embodiments is only used to help understand themethod of the present application and its spiritual idea. Meanwhile, forthose skilled in the art, according to the present the idea ofinvention, changes will be made in specific embodiment and application.In summary, the contents of this specification should not be construedas limiting the present application.

What is claimed is:
 1. A pixel unit of a display panel, comprising: ascan signal line; a data signal line perpendicularly intersecting thescan signal line, wherein an aperture region is formed in anintersection location between the scan signal line and the data signalline; a common signal line disposed to be parallel to the scan signalline, wherein a common electrode is formed on the common signal line; apixel electrode disposed in the aperture region; and a transparentshielding electrode element connected to the common signal line andextending from the common signal line into the aperture region, whereinan orthogonal projection of the transparent shielding electrode elementon a plane where the common signal line is located at least partiallyoverlap the common signal line.
 2. The pixel unit of the display panelaccording to claim 1, wherein the transparent shielding electrodeelement is U-shaped, and comprises a first shielding section and twosecond shielding sections, the two second shielding sections extend fromthe common signal line into the aperture region, an end of each of thesecond shielding sections is connected to the common signal line,another end of each of the second shielding sections is connected to anend of the first shielding section, and an orthogonal projection of eachof the second shielding sections on the plane where the common signalline is located at least partially overlaps the common signal line. 3.The pixel unit of the display panel according to claim 1, wherein thetransparent shielding electrode element comprises two shielding bars,the two shielding bars are individual and spaced from each other, andextend from the common signal line into the aperture region, an end ofeach of the shielding bars is connected to the common signal line, andan orthogonal projection of each of the shielding bars on the planewhere the common signal line is located at least partially overlaps thecommon signal line.
 4. The pixel unit of the display panel according toclaim 1, wherein the transparent shielding electrode element and thecommon signal line are individually independent elements, and contactand are connected to each other.
 5. The pixel unit of the display panelaccording to claim 1, wherein a material of the transparent shieldingelectrode element is indium tin oxide.
 6. A lower substrate of a displaypanel, comprising a glass substrate, and a first metal layer, a secondmetal layer, and a first transparent conductive layer sequentiallystacked on the glass substrate, wherein the lower substrate furthercomprises: a scan signal line formed by patterning the first metallayer; a data signal line formed by patterning the second metal layer,perpendicularly intersecting the scan signal line, wherein an apertureregion is formed in an intersection location between the scan signalline and the data signal line; a common signal line disposed on a samelayer with the scan signal line and parallel to the scan signal line,wherein a common electrode is formed on the common signal line; a pixelelectrode formed by patterning the first transparent conductive layer,and disposed in the aperture region; and a transparent shieldingelectrode element connected to the common signal line, extending fromthe common signal line into the aperture region, and an orthogonalprojection of the transparent shielding electrode element on a planewhere the common signal line is located at least partially overlaps thecommon signal line for providing a shielding effect and lower aparasitic capacitor between the pixel electrode and the data signalline.
 7. The lower substrate of the display panel according to claim 6,wherein the transparent shielding electrode element comprises a firstshielding section and two second shielding sections extending from thefirst shielding section and spaced from each other, each of the secondshielding sections is connected to the common signal line by contact orintegral formation, and an orthogonal projection of each of the secondshielding sections on the plane where the common signal line is locatedoverlaps the common signal line.
 8. The lower substrate of the displaypanel according to claim 6, wherein the transparent shielding electrodeelement comprises two shielding bars being individual and spaced fromeach other, and each of the shielding bars is connected to the commonsignal line by contact or integral formation, and an orthogonalprojection of each of the shielding bars on the plane where the commonsignal line is located overlaps the common signal line.
 9. The lowersubstrate of the display panel according to claim 6, further comprisinga second transparent conductive layer, wherein the second transparentconductive layer is disposed between the glass substrate and the firstmetal layer, and the transparent shielding electrode element is formedby patterning the second transparent conductive layer.
 10. The lowersubstrate of the display panel according to claim 6, wherein: thetransparent shielding electrode element and the common signal line areindividually independent elements, and contact and are connected to eachother; and a material of the transparent shielding electrode element isindium tin oxide.
 11. The lower substrate of the display panel accordingto claim 10, wherein the transparent shielding electrode elementcomprises a first shielding section and two second shielding sectionsextending from the first shielding section and spaced from each other,each of the second shielding sections is connected to the common signalline by contact or integral formation, and an orthogonal projection ofeach of the second shielding sections on the plane where the commonsignal line is located overlaps the common signal line.
 12. The lowersubstrate of the display panel according to claim 10, wherein thetransparent shielding electrode element comprises two shielding barsbeing individual and spaced from each other, and each of the shieldingbars is connected to the common signal line by contact or integralformation, and an orthogonal projection of each of the shielding bars onthe plane where the common signal line is located overlaps the commonsignal line.
 13. The lower substrate of the display panel according toclaim 10, further comprising a second transparent conductive layer, thesecond transparent conductive layer is disposed between the glasssubstrate and the first metal layer, and the transparent shieldingelectrode element is formed by patterning the second transparentconductive layer.
 14. A display panel, comprising: a lower substrate, anupper substrate disposed opposite to the lower substrate, and a liquidcrystal layer disposed between the upper substrate and the lowersubstrate, wherein the lower substrate comprises: a glass substrate, anda first metal layer, a second metal layer, and a first transparentconductive layer sequentially stacked on the glass substrate; a scansignal line formed by patterning the first metal layer; a data signalline formed by patterning the second metal layer, perpendicularlyintersecting the scan signal line, wherein an aperture region is formedin an intersection location between the scan signal line and the datasignal line; a common signal line disposed on a same layer with the scansignal line and parallel to the scan signal line, wherein a commonelectrode is formed on the common signal line; a pixel electrode formedby patterning the first transparent conductive layer, and disposed inthe aperture region; and a transparent shielding electrode elementconnected to the common signal line, extending from the common signalline into the aperture region, and an orthogonal projection of thetransparent shielding electrode element on a plane where the commonsignal line is located at least partially overlaps the common signalline.
 15. The display panel according to claim 14, wherein thetransparent shielding electrode element comprises a first shieldingsection and two second shielding sections extending from the firstshielding section and spaced from each other, each of the secondshielding sections is connected to the common signal line by contact orintegral formation, and an orthogonal projection of each of the secondshielding sections on the plane where the common signal line is locatedoverlaps the common signal line.
 16. The display panel according toclaim 14, wherein the transparent shielding electrode element comprisestwo shielding bars being individual and spaced from each other, and eachof the shielding bars is connected to the common signal line by contactor integral formation, and an orthogonal projection of each of theshielding bars on the plane where the common signal line is locatedoverlaps the common signal line.
 17. The display panel according toclaim 14, further comprising a second transparent conductive layer, thesecond transparent conductive layer is disposed between the glasssubstrate and the first metal layer, and the transparent shieldingelectrode element is formed by patterning the second transparentconductive layer.
 18. The display panel according to claim 14, whereinthe transparent shielding electrode element comprises a first shieldingsection and two second shielding sections extending from the firstshielding section and spaced from each other, each of the secondshielding sections is connected to the common signal line by contact orintegral formation, and an orthogonal projection of each of the secondshielding sections on the plane where the common signal line is locatedoverlaps the common signal line; the transparent shielding electrodeelement comprises two shielding bars being individual and spaced fromeach other, and each of the shielding bars is connected to the commonsignal line by contact or integral formation, and an orthogonalprojection of each of the shielding bars on the plane where the commonsignal line is located overlaps the common signal line; and the displaypanel further comprises a second transparent conductive layer, thesecond transparent conductive layer is disposed between the glasssubstrate and the first metal layer, and the transparent shieldingelectrode element is formed by patterning the second transparentconductive layer.
 19. The display panel according to claim 14, whereinthe transparent shielding electrode element and the common signal lineare individually independent elements, and contact and are connected toeach other.
 20. The display panel according to claim 14, wherein amaterial of the transparent shielding electrode element is indium tinoxide.